Anomalous remanent magnetization dependence of exchange bias effect in Ni50Mn37In13

Here, we report an anomalous remanent magnetization dependence of exchange bias effect in Ni50Mn37In13 alloy. Both the value of exchange bias field and its sign can be tuned by the amplitude of remanent magnetization without changing its sign. This tunability is strongly dependent on the direction of initial magnetizing field for the hysteresis loop measurements. These results can be explained well by our recent proposal of isothermal field-induced transition from superspin glass to superferromagnetic state in Ni50Mn37In13 alloy.